Description of problem:
at jobs always run in the login shell now, even though at generates a command file that uses $SHELL.  In older versions of Fedora (see Additional info), at took the value of $SHELL from the environment where at is run.  This allows e.g. csh users to submit inline at jobs with sh syntax, making build scripts more robust.


Version-Release number of selected component (if applicable):
3.1.12-5.fc14.x86_64

How reproducible:
100%

Steps to Reproduce:
1.As a csh user, run an at job like this:
env SHELL=/bin/sh at now+1minute <<END
echo output of set
set
echo output of env
env
END
  
Actual results:
The script was run using csh (the set command shows shell variables rather than environment variables).
SHELL is missing from the output of env.

Expected results:
SHELL should be present and should be used to run the script.

Additional info:

This was implemented in Fedora 3 and 7 at least by a patch called at-3.1.8-fix_no_export.patch, which fixed an unrelated bug in the filtering of the SHELLOPTIONS environment variable (all environment variables which are a prefix of SHELLOPTIONS are removed, not just SHELL).  According the rpm changelog, this was to fix bug 131510 which I don't have permission to view.

According to the git logs, at-3.1.8-fix_no_export.patch was merged into at-3.1.8-t_option.patch (tag at-3_1_10-12_fc8).  That patch was later removed (tag at-3_1_11-1_fc13).

FWIW, Solaris uses $SHELL.